clean up templates

for collector, dea, hm, login, nats, syslog_aggregator, uaa
fill description fields in jobs/collector/spec"
 remove extra spaces in jobs/collector/spec
fill description fields in spec file for dea_next, health-manager and syslog_aggregator
fill description fields in spec file for uaa and login
update syslog_aggregator/spec to add nats properties.